Combined effects of exercise and different levels of acute hypoxic severity: A randomized crossover study on glucose regulation in adults with overweight

Frontiers in Physiology

Physiology

Mohd Rizal Md Razali¹  Wee Kian Yeo¹  Nurhamizah Rahmat¹  Chris Chow Li Tee²  Evelyn B. Parr³  Donny M. Camera⁴  Matthew B. Cooke⁴  Mee Chee Chong⁴ 

[1] Division of Research and Innovation, National Sports Institute of Malaysia, Kuala Lumpur, Malaysia;Division of Research and Innovation, National Sports Institute of Malaysia, Kuala Lumpur, Malaysia;Sport and Exercise Medicine Group, Swinburne University of Technology Melbourne, Hawthorn, VI, Australia;Exercise and Nutrition Research Program, Mary Mackillop Institute for Health Research, Australia Catholic University, Melbourne, VI, Australia;Sport and Exercise Medicine Group, Swinburne University of Technology Melbourne, Hawthorn, VI, Australia;

关键词: hypoxia;    low-intensity exercise;    exerkines;    apelin;    FGF-21;   

DOI  :  10.3389/fphys.2023.1174926

 received in 2023-02-27, accepted in 2023-04-05,  发布年份 2023

来源: Frontiers

【 摘 要 】

Purpose: The aim of this study was to investigate the influence of manipulating hypoxic severity with low-intensity exercise on glucose regulation in healthy overweight adults.Methods: In a randomized crossover design, 14 males with overweight (age: 27 ± 5 years; body mass index (BMI) 27.1 ± 1.8 kg⋅m2) completed three exercise trials involving 60 min aerobic exercise cycling at 90% lactate threshold in normoxia (NM, FiO2 = 20.9%), moderate hypoxia (MH, FiO2 = 16.5%) and high hypoxia (HH, FiO2 = 14.8%). A post-exercise oral glucose tolerance test (OGTT) was performed. Venous blood samples were analyzed for incremental area under the curve (iAUC), plasma glucose and insulin, as well as exerkine concentrations (plasma apelin and fibroblast growth factor 21 [FGF-21]) pre- and post-exercise. A 24-h continuous glucose monitoring (CGM) was used to determine interstitial glucose concentrations. Heart rate, oxygen saturation (SpO2) and perceptual measures were recorded during exercise.Results: Post-exercise OGTT iAUC for plasma glucose and insulin concentrations were lower in MH vs. control (p = 0.02). Post-exercise interstitial glucose iAUC, plasma apelin and FGF-21 were not different between conditions. Heart rate was higher in HH vs. NM and MH, and MH vs. NM (p < 0.001), while SpO2 was lower in HH vs. NM and MH, and MH vs. NM (p < 0.001). Overall perceived discomfort and leg discomfort were higher in HH vs. NM and MH (p < 0.05), while perceived breathing difficulty was higher in HH vs. NM only (p = 0.003).Conclusion: Compared to higher hypoxic conditions, performing acute aerobic-based exercise under moderate hypoxia provided a more effective stimulus for improving post-exercise glucose regulation while concomitantly preventing excessive physiological and perceptual stress in healthy overweight adults.

【 授权许可】

Unknown   
Copyright © 2023 Tee, Parr, Cooke, Chong, Rahmat, Md Razali, Yeo and Camera.